Tech Progression · Dual Gate
Reaching Tier 5 in Sandustry requires satisfying a dual progression gate: producing a cumulative total of 10,000 Florinol and completing the subterranean Anomaly Orb investigation. This walkthrough details the prerequisite chemical production chain, subterranean ruin navigation, and how to verify your tech tree state.
Quick answer
Tier 5 uses a dual progression gate: producing 10,000 Florinol is only the manufacturing half. You must also explore underground ruins to locate and investigate the Anomaly Orb. If you met both criteria on an older save and Tier 5 remains locked, updating to v0.5.4+ automatically self-heals the blocked objective on reload.
01
Unlike early research milestones in Sandustry that unlock purely through resource quotas, Tier 5 enforces a Dual Progression Gate. You must simultaneously fulfill an industrial chemistry requirement (producing 10,000 Florinol) and an exploration milestone (investigating the subterranean Anomaly Orb).
A frequent point of player confusion is fulfilling the Florinol target and finding the research node still greyed out. Tier 5 will not activate until both branches register complete in the objective tracker.
02
Florinol is the late-game refined liquid fuel that powers Tier 5 automation. Generating the required volume demands a four-stage processing backbone: Wet Seeds grown in Planter Boxes to yield Amethelis, Steam Dryers to produce Dry Amethelis, thermal sublimation into Florin Gas, and Condensers to yield liquid Florinol.
Route liquid Florinol into sealed Florinol Batteries or closed storage tanks to ensure the cumulative 10,000 threshold registers without evaporation or thermal waste.
04
In early release builds, an engine bug softlocked save files: players who fulfilled both the Anomaly Orb recovery and the 10,000 Florinol quota found Tier 5 permanently locked. In Update #1 (v0.5.4), developer Lantto Games officially patched this logic and built self-healing checks directly into the save loader.
Additionally, hotfix v0.5.3 improved objective clarity: the research tree now visually marks which specific objective is blocking progression. If you encounter a stuck state from an older session, simply saving and reloading on version v0.5.4 or higher will automatically unlock Tier 5.
| Progression Stage | Mandatory Requirement | Official Engine Rule / Verification |
|---|---|---|
| Manufacturing Gate | 10,000 Florinol Total | Accumulate refined Florinol via automated Condenser arrays |
| Exploration Gate | Anomaly Orb Recovery | Navigate underground Limestone ruins; retrieve ancient Orb |
| Research Display | Objective Blocking Highlight | Hotfix v0.5.3 highlights exact pending objective on research UI |
| Legacy Softlock Fix | v0.5.4 Save Self-Healing | Update #1 (v0.5.4) automatically repairs blocked Tier 5 on reload |
| Subsequent Milestone | 100,000 Energy Grid | Revealed after Tier 5 unlock; requires high-capacity battery grid |
Questions answered
Unlocking Tier 5 requires completing both sides of a dual progression gate: producing a cumulative total of 10,000 Florinol and locating the underground Anomaly Orb in ancient ruins.
In early builds, an engine bug softlocked Tier 5 progression despite completing the anomaly investigation. Update #1 (v0.5.4) permanently fixed this; simply loading your save in v0.5.4+ automatically repairs the progression state.
No. Official catalogue data confirms Limestone is impervious to all known tools; puzzle rooms must be navigated through existing corridors or movable gates.
No. The 100,000 Energy requirement is a subsequent endgame milestone revealed after Tier 5 is already unlocked, not a prerequisite for unlocking the tier.
Since hotfix v0.5.3, the research panel visually highlights which specific objective is incomplete, showing whether an exploration task or resource quota is pending.
Evidence notes
These are useful player examples, not official specifications.
